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Izidor Hafner
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Demonstrations 21  40 of 1022
Nets for Regular Spherical Models
Updated this month
Spherical Models of Polyhedra
Updated this month
21. Construct a Triangle with Equal Base Angles That Are Each Double the Third Angle
19. Construct a Triangle Given the Length of Its Base, the Difference of Its Base Angles and a Special Point of Intersection
18. Construct a Triangle Given the Length of Its Base, the Difference of Angles at Its Base and the Point of Intersection of an Angle Bisector with Its Base
Vieta's Solution of a Cubic Equation
Constructing a Regular Heptagon Using Gleason's Method
Bisecting a Line Segment Using Sticks of Equal Length
Lill's Construction for a Depressed Cubic Polynomial
Lill's Graphic Solution of a Quadratic Equation
Lill's Angle Trisection
Decomposition of a Tetrahedron into Four Congruent Parts
Conway's Billiard Ball Loop
A Sequence of Inscribed Platonic Solids
Clairaut's Differential Equation
A Net That Folds into an Icosahedron or into a Double Biaugmented Triangular Prism
The Plemelj Construction of a Triangle: 2
Nets for a TwoCube Calendar
The Plemelj Construction of a Triangle: 13
The Plemelj Construction of a Triangle: 12
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